subtle

Wiki

Sublets are small Ruby scripts written in a small DSL that can provide things like system information for the panel. They are well included in the main loop of subtle and can be used in various ways. Further information about writing a sublet can be found here.

Ok, you asked for it: Point your browser to http://sur.subforge.org/ and download a sublet. Then you need to unpack the sublet - they are just tarballs. Once unpacked you will probably find three types of files:

Sublets can also provide grabs (since r2608), that are just added to the supported types and can be used like all other from the config. Like notes and config it's up to the author to supply information, sur shows of list of grabs with following command: sur grabs subletname